WO2012132258A1 - 分散型発電システム及びその運転方法 - Google Patents
分散型発電システム及びその運転方法 Download PDFInfo
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- WO2012132258A1 WO2012132258A1 PCT/JP2012/001595 JP2012001595W WO2012132258A1 WO 2012132258 A1 WO2012132258 A1 WO 2012132258A1 JP 2012001595 W JP2012001595 W JP 2012001595W WO 2012132258 A1 WO2012132258 A1 WO 2012132258A1
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- power
- power generation
- generation system
- inverter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/10—The dispersed energy generation being of fossil origin, e.g. diesel generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/30—The power source being a fuel cell
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Definitions
- the present invention relates to a distributed power generation system linked to a commercial power source and an operation method thereof.
- the distributed power generation device examples include a solar power generation device and a fuel cell power generation system.
- the distributed power generation device examples include a solar power generation device and a fuel cell power generation system.
- one (one type) of distributed power generators has been installed in one household.
- two types of distributed power generators have been developed.
- cases are beginning to occur at home.
- an increasing number of households are capable of so-called double power generation, in which both a solar power generation device and a fuel cell power generation system are installed in one home and power is generated by two types of distributed power generation devices.
- FIG. 7 is a schematic diagram showing a schematic configuration of the power distribution system disclosed in Patent Document 1. As shown in FIG.
- a fuel cell 111 and a solar cell 101 are connected to an electric wire 102 that connects a system power supply and an AC load (for example, a household power load). Yes.
- the fuel cell 111 is connected to the first connection point 105 of the electric wire 102 via the electric wire 106.
- the solar cell 101 is connected to the second connection point 107 of the electric wire 102 via the electric wire 108.
- a power conditioner 112 In the middle of the electric wire 106, a power conditioner 112 is provided.
- the power conditioner 112 converts the DC power generated by the fuel cell 111 into AC power and supplies the AC load with power.
- a power conditioner 103 is provided in the middle of the electric wire 108.
- the power conditioner 103 converts DC power generated by the solar battery 101 into AC power, and supplies power to a reverse power flow or AC load to the system power supply.
- the 1st current sensor 104a is provided between the 1st connection point 105 and the 2nd connection point 107 of the electric wire 102. Further, a second current sensor 104b is provided on the second connection point 107 side of the power conditioner 103 of the electric wire 108.
- the output control unit 113 controls the power conditioner 112 based on the current values detected by the first current sensor 104a and the second current sensor 104b.
- the location where the first current sensor 104a is wrong for example, the system power supply of the electric wire 102 and the second connection point 107 In some cases, it was attached between. In such a case, there has been a problem that the power used by the AC load cannot be accurately detected by the first current sensor 104a.
- This invention solves the said conventional subject, and it aims at providing the distributed power generation system which can judge whether the current sensor is normally installed by simple structure.
- a distributed power generation system is a distributed power generation system connected to an electric wire connecting a commercial power source and an electric power load, wherein the commercial power source and the first connection in the electric wire are connected.
- a second power generation device is connected between the points, and the distributed power generation system includes an inverter connected at the first connection point, a first power generation device that supplies power to the inverter, A current sensor provided between the commercial power source and the first connection point of the electric wire, and a controller, and a positive current is defined as a current flowing in the direction from the first connection point to the commercial power source.
- the controller determines that the current sensor is in an abnormal installation state. Or notifying the abnormality of the installation state of the current sensor.
- the distributed power generation system and its operation method of the present invention it is possible to determine the installation state of the current sensor.
- FIG. 1 is a schematic diagram showing a schematic configuration of the distributed power generation system according to the first embodiment.
- FIG. 2 is a schematic diagram illustrating a state in which the current sensor is installed at an incorrect position in the distributed power generation system.
- FIG. 3 is a flowchart showing determination of the installation state of the current sensor of the controller in the distributed power generation system according to the first embodiment.
- FIG. 4 is a flowchart showing determination of the installation state of the current sensor of the controller in the distributed power generation system according to the second embodiment.
- FIG. 5 is a flowchart showing determination of the installation state of the current sensor of the controller in the distributed power generation system according to the third embodiment.
- FIG. 6 is a schematic diagram showing a schematic configuration of a distributed power generation system according to Embodiment 4 of the present invention.
- FIG. 7 is a schematic diagram showing a schematic configuration of the power distribution system disclosed in Patent Document 1. As shown in FIG.
- the distributed power generation system is a distributed power generation system that is connected to an electric wire that connects a commercial power source and an electric power load, and is between the commercial power source and the first connection point in the electric wire.
- the second power generator is connected, and the distributed power generation system includes an inverter connected at a first connection point, a first power generator that supplies power to the inverter, and a commercial power source and a first connection in an electric wire.
- a current sensor provided between the points and a controller, and when the current flowing in the direction from the first connection point to the commercial power source is a positive current, the controller uses the output power of the inverter.
- the distributed power generation system further includes a display that changes the display content based on information transmitted from the controller, and the controller has a difference power greater than the first threshold value.
- an abnormality in the installation state of the current sensor may be displayed on the display.
- the notification of the abnormality of the installation state of the current sensor may be a mode in which the abnormality is directly notified to the maintenance company, or may be notified by a siren or a speaker.
- FIG. 1 is a schematic diagram showing a schematic configuration of the distributed power generation system according to the first embodiment, and shows a state where a current sensor is installed at a correct position.
- the distributed power generation system 28 is connected to an electric wire 33 that connects a commercial power supply 21 and a power load 24 and includes a single-phase two-wire or a single-phase three-wire.
- a second power generation device 29 is connected between the commercial power source of the electric wire 33 and the first connection point 23. Specifically, the second power generation device 29 is connected to the second connection point 30 of the electric wire 33 via the electric wire 35.
- the second power generation device 29 is a power generation device that generates power using natural energy such as sunlight, wind power, and solar heat.
- the power load 24 is a device that consumes power, such as a washing machine, an air conditioner, or a refrigerator installed in the home.
- the distributed power generation system 28 includes a current sensor 22, an inverter 25, a controller 26, a first power generation device 27, and a display 32.
- the first power generation device 27 is connected to the first connection point 23 of the electric wire 33 via the electric wire 34.
- An inverter 25 is provided in the middle of the electric wire 34.
- the first power generation device 27 is a power generation device that generates power with fossil fuel, and examples thereof include a so-called generator such as a fuel cell or a gas turbine.
- the inverter 25 is configured to convert the DC power generated by the first power generator 27 into AC power and supply the AC power to the power load 24.
- the inverter 25 is configured to detect the voltage value of the electric wire 34 (electric wire 33).
- the current sensor 22 is provided between the first connection point 23 and the second connection point 30 of the electric wire 33.
- the current sensor 22 is a sensor that is installed in a distribution board of a consumer (not shown) and detects the magnitude and direction of the current flowing through the electric wire 33.
- the current sensor 22 sets the magnitude and direction (current value) of the current flowing through the electric wire 33, with the current in the direction flowing from the first connection point 23 (the power load 24) to the commercial power supply 21 being a positive current. It is configured to detect and output the detected current value to the controller 26.
- Examples of the current sensor 22 include a clamp-type alternating current sensor.
- the controller 26 may be in any form as long as it is a device that controls the distributed power generation system 28.
- the controller 26 includes an arithmetic processing unit exemplified by a microprocessor, a CPU, and the like, and a storage unit configured by a memory that stores a program for executing each control operation.
- the controller 26 reads out a predetermined control program stored in the storage unit by the arithmetic processing unit and executes it to execute various controls related to the distributed power generation system 28, for example, the first power generation device 27.
- the power generation and the output power from the inverter 25 are controlled.
- the controller 26 determines that the installation state of the current sensor 22 is abnormal when the difference power obtained by subtracting the power consumption of the power load 24 from the output power of the inverter 25 is greater than a first threshold value greater than 0, or It is configured to notify an abnormality in the installation state of the current sensor 22.
- the display device 32 is configured to display an abnormality in the installation state of the current sensor 22. The determination of the installation state of the current sensor 22 will be described later.
- the controller 26 is not only configured as a single controller but also configured as a group of controllers that execute control of the distributed power generation system 28 in cooperation with a plurality of controllers. It doesn't matter. Further, the controller 26 may be configured by a micro control, and may be configured by an MPU, a PLC (Programmable Logic Controller), a logic circuit, or the like.
- the display device 32 may be in any form as long as it can display information (character data, image data, etc.) output from the controller 26.
- a remote controller a mobile phone, a smartphone, a tablet computer, or the like can be used.
- the display device 32 may include an operation unit such as a switch, a display unit such as an LCD screen, or a notification unit such as a speaker.
- FIG. 2 is a schematic diagram showing a state where the current sensor is installed at the wrong position in the distributed power generation system.
- the distributed power generation system 28 of FIG. 2 has the same components as the distributed power generation system 28 shown in FIG. 1, but the current sensor 22 is connected between the commercial power supply 21 of the electric wire 33 and the second connection point 30. Is different.
- the current sensor 22 detects ⁇ 1.0 A
- the inverter 25 outputs at 750 W, and detects a voltage value of 100 V.
- 100 W of power is supplied from the commercial power source 21 and / or the second power generation device 29 to the power load 24.
- the power consumed by the power load 24 is 850 W.
- the electric current sensor is further provided in the electric wire 35 like the power distribution system currently disclosed by the said patent document 1, it will be supplied to the electric power load 24 from the commercial power source 21 and / or the 2nd electric power generating apparatus 29. Electric power can also be calculated (acquired). For example, when the current sensor provided in the electric wire 35 detects 0.0 A, 100 W of power is supplied from the commercial power source 21. When the current sensor detects 1.0 A, the second power generation device 29 is generating 100 W.
- the current value detected by the current sensor provided on the electric wire 35 is 0.0 A.
- the power consumed by the power load 24 is 850 W.
- the second power generation device 29 generates power at 100 W, the current value detected by the current sensor provided in the electric wire 35 is 1.0 A, but the power consumed by the power load 24 Is 950W.
- the controller 26 determines whether or not the current sensor 22 is positioned at the correct position.
- FIG. 3 is a flowchart showing determination of the installation state of the current sensor of the controller in the distributed power generation system according to the first embodiment.
- the controller 26 acquires the current value detected by the current sensor 22 from the current sensor 22 (step S101). Next, the controller 26 acquires a voltage value applied to the electric wire 34 (electric wire 33) from the inverter 25 (step S102).
- the controller 26 calculates a differential power obtained by subtracting the power consumption of the power load 24 from the output power of the inverter 25 from the current value acquired in step S101 and the voltage value acquired in step S102 (step S103). Then, it is determined whether or not the differential power is larger than the first threshold (step S104).
- the first threshold value is electric power larger than 0, and in the case where the distributed power generation system 28 is set to prevent reverse power flow, an interconnection agreement with the electric power company (commercial power supply 21 It is possible to arbitrarily set with a power greater than 50 W as a set value in the arrangement for connection). As a 1st threshold value, it is good also as 300W, for example. Further, the first threshold value may be the output power of the inverter 25 or the maximum output of the inverter 25. This is because if the current sensor 22 is provided at a normal position, electric power exceeding the output of the inverter 25 does not flow through the electric wire 33.
- Step S103 When the difference power calculated in Step S103 is larger than the first threshold (Yes in Step S104), the controller 26 displays the installation abnormality of the current sensor 22 on the display 32 (Step S105). End the flow. On the other hand, when the difference power calculated in step S103 is equal to or less than the first threshold (No in step S104), the controller 26 is in the present flow as it is because the current sensor 22 is provided at a normal position. Exit.
- the installation state of the current sensor 22 can be determined. Further, when the installation state of the current sensor 22 is abnormal, it is possible to start the maintenance work early by notifying the user of the abnormality by displaying the current sensor 22 on the display 32.
- the controller disconnects the connection between the inverter and the electric wire when the differential power is larger than the first threshold, and the first power generation device The mode which stops electric power generation is illustrated.
- the configuration of the distributed power generation system 28 according to the second embodiment of the present invention is the same as the configuration of the distributed power generation system 28 according to the first embodiment, the description thereof is omitted.
- FIG. 4 is a flowchart showing determination of the installation state of the current sensor of the controller in the distributed power generation system according to the second embodiment.
- step S105A is executed instead of step S105.
- step S104 when the difference power calculated in step S103 is larger than the first threshold value (Yes in step S104), the controller 26 disconnects a relay (not shown) and connects the inverter 25 and the electric wire 33 (commercial power). The power source 21) is disconnected, and the power generation of the first power generation device 27 is stopped (step S105A).
- step S105A the power generation of the first power generation device 27 is stopped in step S105A for the following reason.
- the differential power is larger than the first threshold, the installation position of the current sensor 22 is abnormal.
- the inverter 25 is reconnected to the commercial power source 21 to supply power to the power load 24, the differential power becomes larger than the first threshold value.
- the inverter 25 is disconnected from the commercial power source 21 again. Therefore, even if the operation of the first power generation device 27 is continued, the raw materials and the like are consumed wastefully, so the power generation of the first power generation device 27 is stopped.
- the installation state of the current sensor 22 can be determined. Further, in the distributed power generation system 28 according to the second embodiment, if it is determined that the installation position of the current sensor 22 is abnormal, the operation of the first power generation device 27 is stopped, and wasteful consumption of raw materials and the like is thereby performed. Can be suppressed.
- the controller 26 displays an abnormality on the display device 32 and then displays the inverter 25 and the electric wire 33 ( The commercial power supply 21) may be disconnected and the power generation of the first power generator 27 may be stopped.
- the first power generation device is set to prevent a reverse power flow to the commercial power supply, and the second power generation device flows a reverse power flow to the commercial power supply. If it is recognized, the controller continues the connection between the inverter and the electric wire if the differential power is greater than 0 and less than or equal to the second threshold, which is a threshold smaller than the first threshold. And when the power generation of the first power generation device is continued and the differential power is larger than the second threshold value and less than or equal to the first threshold value, the connection between the inverter and the electric wire is disconnected, and the first power generation device The mode which continues electric power generation is illustrated.
- the controller when the controller has a difference power equal to or smaller than a second threshold value that is greater than 0 and smaller than the first threshold value, And the power generation of the first power generator may be continued, and the inverter and the electric wire may be connected after a predetermined time has elapsed.
- the configuration of the distributed power generation system 28 according to the third embodiment of the present invention is the same as the configuration of the distributed power generation system 28 according to the first embodiment, the description thereof is omitted.
- FIG. 5 is a flowchart showing determination of the installation state of the current sensor of the controller in the distributed power generation system according to the third embodiment.
- the controller 26 acquires the current value detected by the current sensor 22 from the current sensor 22 (step S201). Next, the controller 26 acquires a voltage value applied to the electric wire 34 (electric wire 33) from the inverter 25 (step S202).
- the controller 26 calculates a differential power obtained by subtracting the power consumption of the power load 24 from the output power of the inverter 25 from the current value acquired in step S201 and the voltage value acquired in step S202 (step S203). Then, it is determined whether or not the difference power is equal to or less than the second threshold value (step S204).
- the second threshold is electric power that is larger than 0 and smaller than the first threshold, and can be arbitrarily set.
- the set value may be 50 W.
- step S203 When the difference power calculated in step S203 is equal to or smaller than the second threshold (Yes in step S204), the controller 26 ends the flow as it is because the current sensor 22 is provided at a normal position. To do. On the other hand, when the difference power calculated in step S203 is larger than the second threshold (No in step S204), the controller 26 proceeds to step S205.
- step S205 the controller 26 determines whether or not the differential power calculated in step S203 is greater than the first threshold value.
- the controller 26 disconnects the relay (not shown) and disconnects the inverter 25 and the electric wire 33 (commercial power supply 21).
- the power generation of the first power generator 27 is stopped (step S206).
- the controller 26 proceeds to step S207.
- step S207 the controller 26 disconnects a relay (not shown) to disconnect the inverter 25 and the electric wire 33 (commercial power supply 21), but continues the power generation of the first power generation device 27. This is because the power consumption of the power load 24 is temporarily reduced, so that the differential power is temporarily larger than the second threshold (a reverse power flow has occurred from the first power generator 27 to the commercial power supply 21). is there.
- the controller 26 disconnects the inverter 25 and the electric wire 33 (commercial power supply 21), and after a predetermined time has elapsed, connects the relay (not shown) to reconnect the inverter 25 and the electric wire 33 (commercial power supply 21). Connect (step S208).
- the predetermined time can be arbitrarily set, and may be 10 minutes or 1 hour.
- the distributed power generation system 28 according to the third embodiment configured as described above has the same effects as the distributed power generation system 28 according to the second embodiment.
- the inverter 25 and the commercial power source 21 are disconnected. Thereafter, the inverter 25 and the commercial power source 21 are reconnected. As a result, when it is detected that a reverse power flow has occurred from the first power generation device 27 to the commercial power source 21, the operation of the first power generation device 27 is stopped and the operation of the first power generation device 27 is stopped. Energy consumption required for restarting can be suppressed, and energy saving can be improved.
- the controller 26 re-connects the inverter 25 and the commercial power source 21 after a predetermined time has elapsed, but is not limited thereto. For example, after step S207, the controller 26 obtains the current value from the current sensor 22 again, calculates the difference power, and when the difference power falls below the second threshold value, the controller 25 restarts the inverter 25 and the commercial power source 21.
- a form of connection may be adopted.
- the controller 26 displays an abnormality on the display device 32 and then displays the inverter 25 and the electric wire 33 ( The commercial power supply 21) may be disconnected and the power generation of the first power generator 27 may be stopped.
- FIG. 6 is a schematic diagram showing a schematic configuration of a distributed power generation system according to Embodiment 4 of the present invention.
- the distributed power generation system 28 according to the fourth embodiment of the present invention has the same basic configuration as the distributed power generation system 28 according to the first embodiment, but the arrangement position of the current sensor 22 is the same. Is different. Specifically, the current sensor 22 is provided in the middle of the electric wire 34.
- the distributed power generation system 28 according to the fourth embodiment configured as described above has the same effects as the distributed power generation system 28 according to the first embodiment.
- the distributed power generation system and the operation method thereof according to the present invention are useful because the installation state of the current sensor can be determined.
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Abstract
Description
本発明の実施の形態1に係る分散型発電システムは、商用電源と電力負荷を接続する電線に接続される分散型発電システムであって、電線における商用電源と第1の接続点の間には、第2発電装置が接続されていて、分散型発電システムは、第1の接続点で接続されるインバータと、インバータに電力を供給する第1発電装置と、電線における商用電源と第1の接続点の間に設けられている電流センサと、制御器と、を備え、第1の接続点から商用電源へ流れる方向の電流を正の電流とした場合に、制御器は、インバータの出力電力から電力負荷の消費電力を減算した差分電力が、0より大きい第1閾値より大きい場合に、電流センサの設置状態の異常と判定する、又は電流センサの設置状態の異常を報知する態様を例示するものである。
図1は、本実施の形態1に係る分散型発電システムの概略構成を示す模式図であり、電流センサが正しい位置に設置されている状態を示している。
まず、図1及び図2を参照しながら、電流センサ22の設置位置について説明する。
本発明の実施の形態2に係る分散型発電システムは、制御器が、差分電力が、第1閾値より大きい場合には、インバータと電線との接続を解列させ、かつ、第1発電装置の発電を停止させる態様を例示するものである。
図4は、本実施の形態2に係る分散型発電システムにおける制御器の電流センサの設置状態の判断を示すフローチャートである。
本発明の実施の形態3に係る分散型発電システムは、第1発電装置が、商用電源に逆潮流することを防止するように設定されていて、第2発電装置が、商用電源に逆潮流することが認められている場合に、制御器が、差分電力が、0より大きく、かつ、第1閾値より小さい閾値である第2閾値以下の場合には、インバータと電線との接続を継続させ、かつ、第1発電装置の発電を継続させ、差分電力が第2閾値より大きく、かつ、第1閾値以下の場合には、インバータと電線との接続を解列させ、かつ、第1発電装置の発電を継続させる態様を例示するものである。
図5は、本実施の形態3に係る分散型発電システムにおける制御器の電流センサの設置状態の判断を示すフローチャートである。
図6は、本発明の実施の形態4に係る分散型発電システムの概略構成を示す模式図である。
22 電流センサ
23 第1の接続点
24 電力負荷
25 インバータ
26 制御器
27 第1発電装置
28 分散型発電システム
29 第2発電装置
30 第2の接続点
31 第3の接続点
32 表示器
33 電線
34 電線
35 電線
101 太陽電池
102 電線
103 パワーコンディショナ
104a 第1電流センサ
104b 第2電流センサ
105 第1接続点
106 電線
107 第2接続点
108 電線
111 燃料電池
112 パワーコンディショナ
113 出力制御部
Claims (8)
- 商用電源と電力負荷を接続する電線に接続される分散型発電システムであって、
前記電線における前記商用電源と第1の接続点の間には、第2発電装置が接続されていて、
前記分散型発電システムは、
前記第1の接続点で接続されるインバータと、
前記インバータに電力を供給する第1発電装置と、
前記電線における前記商用電源と前記第1の接続点の間に設けられている電流センサと、
制御器と、を備え、
前記第1の接続点から前記商用電源へ流れる方向の電流を正の電流とした場合に、
前記制御器は、前記インバータの出力電力から前記電力負荷の消費電力を減算した差分電力が、0より大きい第1閾値より大きい場合に、前記電流センサの設置状態の異常と判定する、又は前記電流センサの設置状態の異常を報知する、分散型発電システム。 - 前記制御器は、前記差分電力が、前記第1閾値より大きい場合には、前記インバータと前記電線との接続を解列させ、かつ、前記第1発電装置の発電を停止させる、請求項1に記載の分散型発電システム。
- 前記第1発電装置は、前記商用電源に逆潮流することを防止するように設定されていて、
前記第2発電装置は、前記商用電源に逆潮流することが認められている場合に、
前記制御器は、
前記差分電力が、0より大きく、かつ、前記第1閾値より小さい閾値である第2閾値以下の場合には、前記インバータと前記電線との接続を継続させ、かつ、前記第1発電装置の発電を継続させ、
前記差分電力が前記第2閾値より大きく、かつ、前記第1閾値以下の場合には、前記インバータと前記電線との接続を解列させ、かつ、前記第1発電装置の発電を継続させる、請求項1又は2に記載の分散型発電システム。 - 前記制御器は、前記差分電力が、0より大きく、かつ、前記第1閾値より小さい閾値である第2閾値以下の場合には、前記インバータと前記電線との接続を継続させ、かつ、前記第1発電装置の発電を継続させ、
所定時間経過後に、前記インバータと前記電線とを接続する、請求項3に記載の発電システム。 - 前記第1閾値は、前記インバータの出力である、請求項1~4のいずれか1項に記載の分散型発電システム。
- 前記第1閾値は、前記インバータの最大出力である、請求項1~4のいずれか1項に記載の分散型発電システム。
- 前記制御器から送信される情報に基づいて表示内容を変更する表示器を、さらに備え、
前記制御器は、前記差分電力が、前記第1閾値より大きい場合に、前記電流センサの設置状態の異常を前記表示器に表示させる、請求項1~6のいずれか1項に記載の分散型発電システム。 - 商用電源と電力負荷を接続する電線に接続される分散型発電システムの運転方法であって、
前記電線における前記商用電源と第1の接続点の間には、第2発電装置が接続されていて、
前記分散型発電システムは、
前記第1の接続点で接続されるインバータと、
前記インバータに電力を供給する第1発電装置と、
前記電線における前記商用電源と前記第1の接続点の間に設けられている電流センサと、
制御器と、を備え、
前記第1の接続点から前記商用電源へ流れる方向の電流を正の電流とした場合に
前記制御器は、前記インバータの出力電力から前記電力負荷の消費電力を減算した差分電力が、0より大きい第1閾値より大きい場合には、前記電流センサの設置状態の異常と判定する、又は前記電流センサの設置状態の異常を報知する、分散型発電システムの運転方法。
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US14/009,104 US20140225442A1 (en) | 2011-03-30 | 2012-03-08 | Distributed power generation system and operation method thereof |
EP12764087.8A EP2693590A1 (en) | 2011-03-30 | 2012-03-08 | Distributed power generation system and method for operating same |
JP2013507122A JP5648121B2 (ja) | 2011-03-30 | 2012-03-08 | 分散型発電システム及びその運転方法 |
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EP2755292A4 (en) * | 2011-09-09 | 2015-09-02 | Panasonic Corp | DISTRIBUTED POWER GENERATION SYSTEM AND METHOD OF OPERATION |
EP2924840A4 (en) * | 2012-11-26 | 2015-12-23 | Panasonic Ip Man Co Ltd | POWER SUPPLY SYSTEM, POWER CONVERTING APPARATUS, AND MEASURING SWITCH APPARATUS |
JP2020043642A (ja) * | 2018-09-07 | 2020-03-19 | 株式会社ダイヘン | 電力システムおよび処理装置 |
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CN104767481B (zh) * | 2015-04-28 | 2017-01-25 | 北京铂阳顶荣光伏科技有限公司 | 一种太阳能光伏电站的工作状态监测方法及系统 |
CN104767480B (zh) * | 2015-04-28 | 2017-01-25 | 北京铂阳顶荣光伏科技有限公司 | 用于汇流箱的汇流检测方法及系统、太阳能电站 |
CN104779914B (zh) * | 2015-04-28 | 2017-01-25 | 北京铂阳顶荣光伏科技有限公司 | 用于汇流箱的汇流检测方法及系统、太阳能电站 |
CN104767486B (zh) * | 2015-04-28 | 2017-01-25 | 北京铂阳顶荣光伏科技有限公司 | 用于汇流箱的汇流检测方法及系统、太阳能电站 |
CN104935007B (zh) * | 2015-06-16 | 2017-07-28 | 国网天津市电力公司 | 一种分布式电源并网运行的控制方法 |
WO2017183079A1 (ja) * | 2016-04-18 | 2017-10-26 | 三菱電機株式会社 | 発電システム |
CN114624523A (zh) * | 2020-12-10 | 2022-06-14 | 台达电子企业管理(上海)有限公司 | 多逆变器并联运行时的孤岛检测系统和方法 |
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JPWO2012132258A1 (ja) | 2014-07-24 |
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